/*
 *  Copyright 2017 TWO SIGMA OPEN SOURCE, LLC
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.twosigma.beaker.scala.evaluator;

import com.twosigma.ExecuteCodeCallbackTest;
import com.twosigma.beaker.chart.xychart.Plot;
import com.twosigma.beaker.jupyter.KernelManager;
import com.twosigma.beaker.jvm.object.SimpleEvaluationObject;
import com.twosigma.beaker.scala.ScalaKernelMock;
import com.twosigma.jupyter.KernelParameters;
import org.assertj.core.api.Assertions;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.twosigma.beaker.evaluator.EvaluatorResultTestWatcher.waitForResult;
import static com.twosigma.beaker.jupyter.comm.KernelControlSetShellHandler.IMPORTS;
import static com.twosigma.beaker.jvm.object.SimpleEvaluationObject.EvaluationStatus.ERROR;
import static com.twosigma.beaker.jvm.object.SimpleEvaluationObject.EvaluationStatus.FINISHED;

public class ScalaEvaluatorTest {
  private static ScalaEvaluator scalaEvaluator;

  @BeforeClass
  public static void setUpClass() throws Exception {
    scalaEvaluator = new ScalaEvaluator(null);
    scalaEvaluator.initialize("id", "sid");
  }

  @Before
  public void setUp() throws Exception {
    ScalaKernelMock kernel = new ScalaKernelMock("id", scalaEvaluator);
    KernelManager.register(kernel);
  }

  @After
  public void tearDown() throws Exception {
    KernelManager.register(null);
  }

  @Test
  public void evaluatePlot_shouldCreatePlotObject() throws Exception {
    //given
    String code = "import com.twosigma.beaker.chart.xychart.Plot;\n" +
        "val plot = new Plot();\n" +
        "plot.setTitle(\"test title\");";
    SimpleEvaluationObject seo = new SimpleEvaluationObject(code, new ExecuteCodeCallbackTest());
    //when
    scalaEvaluator.evaluate(seo, code);
    waitForResult(seo);
    //then
    Assertions.assertThat(seo.getStatus()).isEqualTo(FINISHED);
    Assertions.assertThat(seo.getPayload() instanceof Plot).isTrue();
    Assertions.assertThat(((Plot)seo.getPayload()).getTitle()).isEqualTo("test title");
  }

  @Test
  public void evaluateDivisionByZero_shouldReturnArithmeticException() throws Exception {
    //given
    String code = "16/0";
    SimpleEvaluationObject seo = new SimpleEvaluationObject(code, new ExecuteCodeCallbackTest());
    //when
    scalaEvaluator.evaluate(seo, code);
    waitForResult(seo);
    //then
    Assertions.assertThat(seo.getStatus()).isEqualTo(ERROR);
    Assertions.assertThat((String)seo.getPayload()).contains("java.lang.ArithmeticException");
  }

  ;

  @Test
  public void javaImports_shouldBeAdjustedForScala() throws Exception {
    //given
    Map<String, Object> paramMap = new HashMap<>();
    // This import tests both "static" removal and "object" escaping.
    List<String> imports = Arrays.asList(
            "import static com.twosigma.beaker.scala.evaluator.object.ImportTestHelper.staticMethod");
    paramMap.put(IMPORTS, imports);
    KernelParameters kernelParameters = new KernelParameters(paramMap);
    //when
    scalaEvaluator.setShellOptions(kernelParameters);
    String code = "val x = staticMethod()";
    SimpleEvaluationObject seo = new SimpleEvaluationObject(code, new ExecuteCodeCallbackTest());
    scalaEvaluator.evaluate(seo, code);
    waitForResult(seo);
    //then
    Assertions.assertThat(seo.getStatus()).isEqualTo(FINISHED);
  }
}